Daily Sunspot Evaluation
Observation Sheet Friday, 15 June 1951
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 6
- Number of spots (f)
- 46
- Relative number (R)
- 106
- Observer
- MH
- Reading
- all checks consistent
- File
- 19510615.jpg
Sunspot groups
| No | Group (class – spots) | r | p | Margin no. |
|---|---|---|---|---|
| 1 | J – 2 | 0.75 | 59 | |
| 2 | F – 14 | 0.68 | 98 | |
| 3 | J – 2 | 0.78 | 268 | |
| 4 | A – 2 | 0.86 | 270 | |
| 5 | G – 7 | 0.71 | 280 | |
| 6 | D – 19 | 0.44 | 280 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.